Low-Frequency Phonon Modes and Negative Thermal Expansion in A(MO4)2(A = Zr, Hf and M = W, Mo) by Raman and Terahertz Time-Domain Spectroscopy

2008 ◽  
Vol 112 (49) ◽  
pp. 12582-12587 ◽  
Author(s):  
E. J. Liang ◽  
Yuan Liang ◽  
Yan Zhao ◽  
Jie Liu ◽  
Yijian Jiang
Keyword(s):  
Thermal Expansion ◽  
Time Domain ◽  
Negative Thermal Expansion ◽  
Low Frequency ◽  
Terahertz Time Domain Spectroscopy ◽  
Phonon Modes ◽  
Time Domain Spectroscopy

scholarly journals Low-frequency optical phonon modes and carrier mobility in the halide perovskite CH3NH3PbBr3 using terahertz time-domain spectroscopy

2017 ◽  
Vol 111 (20) ◽  
pp. 201903 ◽  
Author(s):  
Daming Zhao ◽  
Jonathan M. Skelton ◽  
Hongwei Hu ◽  
Chan La-o-vorakiat ◽  
Jian-Xin Zhu ◽  
...  
Keyword(s):  
Time Domain ◽  
Optical Phonon ◽  
Carrier Mobility ◽  
Low Frequency ◽  
Terahertz Time Domain Spectroscopy ◽  
Phonon Modes ◽  
Time Domain Spectroscopy ◽  
Halide Perovskite

Low-frequency dynamics of bacteriorhodopsin studied by terahertz time-domain spectroscopy

2010 ◽  
Vol 12 (35) ◽  
pp. 10255 ◽  
Author(s):  
Shintaro Kawaguchi ◽  
Ohki Kambara ◽  
Mikihiro Shibata ◽  
Hideki Kandori ◽  
Keisuke Tominaga
Keyword(s):  
Time Domain ◽  
Low Frequency ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy

scholarly journals Terahertz Time-Domain Spectroscopy and Low-Frequency Raman Scattering of Crystalline and Glassy Pharmaceutical Indapamide

2015 ◽  
Vol 46 ◽  
pp. 16-22 ◽  
Author(s):  
Yukiko Kobayashi ◽  
Tomohiko Shibata ◽  
Tatsuya Mori ◽  
Seiji Kojima
Keyword(s):  
Raman Scattering ◽  
Raman Spectra ◽  
Imaginary Part ◽  
Time Domain ◽  
Low Frequency ◽  
Dielectric Constants ◽  
Coupling Constants ◽  
Exclusion Principle ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy

We performed terahertz time-domain spectroscopy and low-frequency Raman scattering on crystalline and glassy states of pharmaceutical indapamide (IND). We have determined the real and imaginary part of the complex dielectric constants and the imaginary part of the Raman susceptibility in the THz region. Several phonon peaks have been observed in the crystalline IND and the mutual exclusion principle of infrared and Raman spectroscopy holds in the measured frequency range. In a glassy state of IND, a broad absorption peak has been observed in both the THz and the Raman spectra with different spectral shape, and this disagreement indicates that the far-infrared and Raman light-vibration coupling constants are different in the glassy IND. A clear boson peak has been observed in the Raman spectra of the glassy IND at about 0.5 THz.

Low-frequency dynamics of proteins and aqueous solutions studied by terahertz time-domain spectroscopy

2013 ◽  
Author(s):  
Naoki Yamamoto ◽  
Akané Ishihara ◽  
Azusa Kaneko ◽  
Haruka Iguchi ◽  
Ohki Kambara ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Time Domain ◽  
Low Frequency ◽  
Terahertz Time Domain Spectroscopy ◽  
Time Domain Spectroscopy
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